The minimum value of the R S series resistor. The maximum current flowing through the zener diode. Using a zener regulator circuit and calculate using the following formulas: The maximum power rating P Z of the zener diode is in ‘W’. You make the output voltage work according to you by changing a zener diode ratings and Rs (series resistor).ĭesign a ‘Vo’ stabilized power supply is to produce from a ‘Vs’ DC power supply source. It is the most common circuit of a zener diode in voltage regulator configuration. One 9v battery, 100-ohm resistor ( ≥22 ohms), 5.1V zener diode ( ≥1W), some wires or connectors. The load must be connected all the time at the output end while testing or while using it in a circuit to prevent a zener diode from being damaged. Use this 9v to 5v converter (step down) circuit with any other circuit in parallel to the output of zener diode (with a 9volt battery as an input). LED indicators, control circuits, transistor switches, LDR circuits. The circuit shown below is for medium current applications, it is useful for (1-100mA) medium current drawing circuit eg. Then pick the nearest standard value of the resistor. Choose any resistor value, either R1 or R2 (more than 1K Ohm) and calculate the other one. Where, Vo is the o/p voltage taken across resistor R2.
You can design the output voltage according to your need by using this formula:
It is a simple voltage divider configuration. One 9v battery, 1.5k resistor, 1.2k resistor, some multicolor connecting wires. You can connect two LEDs in series across the output of R2 resistor if you are using a 9volt battery as an input. The circuit shown here is the circuit for low current (1-30 mA) applications, suppose we have to take reference voltage for comparison or a very low current drawing circuit of an LED indicator. 9v to 5v converter using a voltage divider: The voltage divider circuit is not recommended for use in the high current application as it has a low output current and lower efficiency. These circuits are basic voltage regulators, the first one is a simple voltage divider using resistors.Īll the circuits have different performance. I have listed all possible circuits, but their application differs from circuit to circuit. Here are the simple circuits that provide +5V from a 9V radio battery. When working with a 9V battery supply, it becomes quite difficult to get a 5V dc power supply for the circuits. Before jumping to the 9v to 5v converter circuit using different schematics, lets talk a bit about it.Ī wide range of IC’s and devices require 5 V DC supply for proper operation.
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